392 



DISCOVERY REPORTS 



1 r 



1 'J .3 t 



LENGTH OF FOETUS PRESENT IN THE UTERUS IN METRES 



Fig. 127. Blue whales. Mean diameter of corpora lutea in ovaries of pregnant females, 



and length of foetus. 



O Corpus luteum of ovulation. ® Corpus luteum of pregnancy. • Former corpus luteum of pregnancy 

 persisting during lactation. . Largest old corpus luteum co-existent in the ovaries with a corpus luteum 

 of ovulation or pregnancy. 



